Power saving in cellular communication networks

Abstract

According to an example aspect of the present disclosure, there is provided an apparatus comprising means for determining that a change of a measurement relaxation status of the apparatus to another measurement relaxation status is triggered, means for determining whether to change the measurement relaxation status to said another measurement relaxation status before a measurement relaxation related event takes place and means for transmitting the report about said another measurement relaxation status to a wireless network node.

1 . A user equipment, UE, comprising at least one processing core and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the UE at least to:
 determine that a change of a measurement relaxation status of the UE to another measurement relaxation status is triggered;   determine whether to change the measurement relaxation status to said another measurement relaxation status before a measurement relaxation related event takes place;   transmit a report about said another measurement relaxation status to a wireless network node, and   receive a configuration, the configuration indicating whether the UE is allowed to change the measurement relaxation status of the UE
 before transmitting the report about said another measurement relaxation status of the UE to the wireless network node, or 
 O while a UE assistance information prohibit timer is running. 
   
     
     
         2 . A UE according to  claim 1 , wherein the measurement relaxation related event is transmission of the report about said another measurement relaxation status to the wireless network node or expiry of the UE assistance information prohibit timer. 
     
     
         3 . A UE according to  claim 1 , wherein the UE is in a measurement relaxation mode before the change and in a non-measurement relaxation mode after the change, or the UE is in the non-measurement relaxation mode before the change and in the non-measurement relaxation mode after the change. 
     
     
         4 . A UE according to  claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the UE to:
 determine whether the UE is allowed to change the measurement relaxation status of the UE based on a status of the UE assistance information prohibit timer and said another measurement relaxation status.   
     
     
         5 . A UE according to  claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the UE to:
 determine whether to change the measurement relaxation status of the UE while the UE assistance information prohibit timer is running.   
     
     
         6 . A UE according to  claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the UE to:
 determine to change the measurement relaxation status of the UE while the UE assistance information prohibit timer is running; and   change the measurement relaxation status to said another measurement relaxation status before the measurement relaxation related event takes place.   
     
     
         7 . A UE according to  claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the UE to:
 determine to change the measurement relaxation status of the UE before the measurement relaxation related event takes place when a measurement relaxation condition is not met while the UE assistance information prohibit timer is running; and   change the measurement relaxation status to said another measurement relaxation status before the measurement relaxation related event takes place.   
     
     
         8 . A UE according to  claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the UE to:
 determine to change the measurement relaxation status of the UE after the measurement relaxation related event has taken place when a measurement relaxation condition is met while the UE assistance information prohibit timer is running; and   change the measurement relaxation status to said another measurement relaxation status after the measurement relaxation related event has taken place.   
     
     
         9 . A UE according to  claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the UE to:
 determine to change the measurement relaxation status of the UE before the measurement relaxation related event takes place when the UE assistance information prohibit timer was not started when a measurement relaxation condition was met and reported.   
     
     
         10 . A UE according to  claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the UE to:
 report that the measurement relaxation status of the UE was changed to said another measurement relaxation status before transmitting the report about said another measurement relaxation status to the wireless network node.   
     
     
         11 . A UE according to  claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the UE to:
 report how long ago before transmitting the report about said another measurement relaxation status of the UE to the wireless network node the measurement relaxation status of the UE was changed.   
     
     
         12 . A UE according to  claim 1 , wherein the measurement relaxation status and said another measurement relaxation status comprise at least one of Radio Resource Management (RRM), Radio Link Monitoring (RLM), and Beam Failure Detection (BFD) measurement relaxation statuses. 
     
     
         13 . A UE according to  claim 1 , wherein the UE is allowed to relax measurements in the measurement relaxation mode and the UE is not allowed to relax measurements in the non-measurement relaxation mode. 
     
     
         14 . A wireless network node comprising at least one processing core and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the wireless network node at least to:
 receive from a user equipment, UE, a report indicating a change of a measurement relaxation status of the UE to another measurement relaxation status as a report about said another measurement relaxation status, and   transmit a configuration, the configuration indicating whether the UE is allowed to change the measurement relaxation status of the UE
 before transmission of the report about said another measurement relaxation status, or 
 while a UE assistance information prohibit timer is running. 
   
     
     
         15 . A wireless network node according to  claim 14 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the wireless network node to:
 receive from the UE reporting that the measurement relaxation status of the UE was changed to said another measurement relaxation status before transmission of the report about said another measurement relaxation status.   
     
     
         16 . A wireless network node according to  claim 14 , wherein the at least one memory and the computer program code are further configured to, with the at least one processing core, cause the wireless network node to:
 receive from the UE reporting how long ago before transmission of the report about said another measurement relaxation status of the UE the measurement relaxation status of the user equipment was changed.